1. Arthrography of the shoulder is a simple, safe, easily interpreted clinical test which is unusually accurate and which provides information that would otherwise be unavailable without an exploratory operation.
2. An arthrographic study is indicated in any case in which the diagnosis is doubtful.
3. The pain-obliteration, abduction-strength test provides an excellent method of selecting candidates for arthrographic study.
4. Capsulitis is an inflammatory condition infrequently, if ever, associated with rupture of the rotator-cuff mechanism.
5. Coexistence of lesions of the biceps tendon and rotator cuff is common.
6. Rupture of the supraspinatus tendon is a common complication of recurrent dislocation of the shoulder and should be looked for by arthrography or at operation.
7. Coexistence of calcification of the subacromial tissues and rupture of the rotatorcuff mechanism is not uncommon in the presence of reduced abduction strength.